This Chandler Game Model Bat has been personally hand-signed by Mets Slugging 3rd Baseman Mark Vientos. A game model bat is the same style, color schemes and design as the bats the players swing in the game! This item was signed in the presence of and witnessed by a representative of Beckett Authentication. It comes with an individually numbered, tamper evident sticker from Beckett which can be reviewed online to ensure authenticity. This process helps to ensure that the product purchased is authentic and eliminates any possibility of duplication or fraud.